Abstract
This paper deals with a study on the collapsing behavior and reliability analysis of very large floating platforms (VLFP) under extreme wave loads. First, a simplified estimation method is presented for collapsing behavior of VLFP by using hexahedral element models. The dominant limit state modes are obtained from an improved system combined with finite element method and plastic node method using hexahedral element models. Next, a simplified estimation method is shortly introduced for the dynamic response of the structure in regular and irregular waves. Finally, the features of the collapsing behavior and reliability level are investigated by a numerical example applied to a 5,000m-class VLFP under trial design.
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